Journal
CATALYSIS COMMUNICATIONS
Volume 135, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.catcom.2019.105901
Keywords
Water splitting; Hydrogen production; Thermochemical cycles; Oxygen carriers; Perovskites
Categories
Funding
- NSTDA-University-Industry Research Collaboration [NUI-RC-E33-21-58-008M]
- Thailand Research Fund [RSA6180061]
- National Research Council of Thailand [KMUTNB-GOV-59-43, KMUTNB-GOV-60-55, KMUTNB-61-GOV-03-44, KMUTNB-61-GOV-C1-46]
- King Mongkut's University of Technology North Bangkok [KMUTNB-GEN-57-49, KMUTNB-GEN-59-65]
- PTT Public Company Limited
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High-purity hydrogen production via water splitting over BaFeO3-delta (BF)-based perovskites was studied, where reduction/oxidation temperatures were paired at 500/500, 700/700 and 900/900 degrees C. Ba0.95La0. 05FeO3-delta (BLF) yielded the highest H-2 production, ca.1310 mu mol/g at 900 degrees C. Adding either La or Gd into BF established a cubic phase structure, allowing a higher concentration of oxygen deficiencies. Sintering was observed over all catalysts, which became more obvious when the oxidation temperature and number of cycles were increased. The apparent activation energy and pre-exponential factor for BLF oxidation in the presence of H2O were estimated to be 47.4 kJ/mol and 0.18 s(-1), respectively.
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